Sash-operating mechanism



May 22. 1928. 7 1,670,332

v E. L. ACKERMAN El AL SASH OPERATING MECHANISM Filed y 1925 2 Sheets-Sheet l INVENTOR.

A TTORNEY.

2 Sheets-Sheet 2 I I N VEN TOR. [ah/am l flake/a4 n fliazl: 1221 2051714 BY ATTORNEY.

May 22, 1928.

E. L. ACKERMAN ET AL S'ASH OPERATING MECHANISM Filed March 5 Patented May 22 1928.

UNITED" STATES 1,670,332 PATENT OFFICE.

EDWARD L. AC'KERIAN AND ALOIS J. ZWIERZINA, F DETROIT, MICHIGAN, AS- IIGIIOBS TO AGKElMAN-BLAESSEB-FEZZEY, INCL, O1. DETROIT, hIICHIGAN, A COR PDIA'I'IOK .01. MICHIGAN.

7 sesn-ornnarme MECHANISM.

Application filed Harch 5, 1925. 'Serial lie/11,392.

This invention relates tosash operating mechanism particularly adapted for use in operation of sliding sash: of closed automobile bodies, and the objectof the invention is to rovide simple and inexpensive device inclhding a laz tong structure expanded and constructe by means of a rack and gear for raising or lowering the sash.

. A feature of the invention is "involved in the rack and gear device and in the opervMing means for the earin by which the sash is automatically ocke in position at any point of its travel.

. A further feature of the invention resides in the utilization of a lazy tong structure and the means for'operating the same whereby comparatively short movement of a rack through operation of a gear causes the sash to move a much greater distance whereby by a. few turns of the gear the sash may be fully raised or lowered.

These and other objects and novel fea tures of the invention are hereinafter more fully described and claimed, and the preferred form of construction of sash operating mechanism embodying our invention 1s shown in the accompanying draw ngs in Fig. 1. is an elevation showlng our mproved operating mechanism In conpmction with asash and frame in which the sash is slidable.

i Fig. 2 is a section taken on line 2--2 of as ig. 3 is an enlarged section showing the lock device. a Fig. 4 is an elevationpartly 1n section taken on line 4-4 of Fig. 3. j

5 is a section of the lock device taken on line 55 of Fig. 1. a

Fig. G is a detail in perspective of part of the lock structure.

In Fig. la part of a frame is shown. This is provided with grooves in the vertical side members to receive opposite side edges of the sash or glass2 and m Fig. 1 it is to be understood that the glass is ;forward of the cross bar 3 extending between the vertical side members of the frame M or recess in whichthe sash is movable. "The Extending from the cross bar 3 to the bottom of the recess is a plate 13, having a vertical slot. 14 therein and pivotally secured to the lower end of the plate 13 arethe bars 15 and 16 of the lazy tongs, the outer ends of whichare pivoted to thebars l7 and 18 i "which in turn are pivoted together on the pin 19 and the upper ends of which'are out wardly and downwardly curved and p'rovid ed with rollers.20 which ride in a way 21 provided "at .the bottom edge of the sash. At the point of connection of the members 17 and 18 with the bars 16 and 15respectively is ositioned a coiled spring 22, the inner on of which is attached to the pivot pin 23, the outer end of which is connected" with a pin 24 in each arm 17 and 18 for the respective springs. These act as cOunterbal ances for theweight of the sash.

The lower end of the rack Thas a lug 25 whichrides in the slot 14 providing a guide therefor and this lower end is connected with the lazy .tongs structure by the two links 26 and 27 together pivoted their upper ends to thelower end of the rack by means of a pivot pin 28 and each respectively pivoted at the lower end at 29 and 80. practically centrally of the bars 16 and 15. By this arrangement it will be understood that rotation of the gear i and conseuent rotation of the gear 6 raises or lowers t e rack 7 in the case 8 provided therefor and this movement downward for instance pushes on the bars 16and 15 tending to collapse the lazy tongs and to move the sash downward in the recess provided therefor,

and upward movement of the rack pulls on these bars 15 and 16' elongating the lazy tongs and raising the sash. By this specific connection ofthe links midway of the length of the arms15 and 16 very little longitudinal movement of the rack 7 causes a considerable movement of the lazy tongs and thus enables the sash to be completely raised or lowered by very little rotation of the handle mem- This movement causes the lug 39 to press.

her, practically three turns of the gear being sufficient for complete operation of the sash in either direction.

It is very desirable that, in themovcment of 'thesashto'any position partly closed for ventilation of a. vehicle body, the sash be locked so that road shock occurring in operation of the vehicle will, not cause the sash to drop and increase the opening. To accom lish this purpose we have provided a pecu iar construction of operating member illustrated more clearly in Figs. 2 to 6 from which it will be observed for instance in Fig. thatthe operating handle 12 is secured to a stud 31 which extends thru the cross bar 3 and is there provided with an enlarged cylindrical part 32 on which is rotatably mounted the gear 11. This stud extends into the block 33 fixedly securedin any approved manner to the enclosing case which is slotted on one side indicated at 34 to receive the gear 4 which meshes with the gear 1. Onthis stubshaft 31 lying between the gear and the cylindrical stationary boss 33 is an actuator 35 which has an elongated slot 36 therein shown in Fig. 6 which fits a similarly shaped piece 37 on the stud shaft and is thus rotatable with this stud shaft. This member 35has two upstanding lugs or ears 38 and 39 shown clearly in Figs. .3 and 6 which are spaced apart as shown and between which lugs is positioned a pin 40 fixed in the gear as shown in Fig. 5. On the stationary boss 33 is a coiled spring 41 which is made in a coil slightly less in diameter than the diameter of the member 33 andthus tightly fits the same. The ends of this coiled spring 42 and 43 cross as shown in Fig. 4 to opposite sides of the pin and between the pin and lugs 38 and 39,

The operation of this deviceis as follows: Let it be supposed that the sash is to be raised under which condition the gearv in Fig. 4 will he*rotated in aleft hand direction as indicated by the arrow. By turning the handle the actuator 35 is first turned.

against the end'42 of the spring which tends to uncoil and loosen the spring on the member 33 and release the friction thereof and thereafterthe lug engages the pin 40 and drives the gear. Likewise, movement in the opposite direction causesthe lug 38 to engage the end. 43 of the spring to release it and thereafter turns the gear through the medium of the pin 20 and thus the sash may be raised or lowered. When the sash has been raised or lowered to the desired position the handle is released and as. movement of the sash downward tends to turn the gear it will be noted from Fig. 3 that this would cause the pin 40 to engage the end 42 of the spring tending to tighten the same on the member 33'and prevent rotation of the gear. Thus, the sash is locked by the friction of the spring which is caused to tighten on the boss 33. lheretore, the sash may be readily raised or lowered through the medium of the handle as described and when the handle is released the parts assume practically the position shown in Fig. 4. Itrequires but little movement of the lug 38 or 39 before it engages the respective ends of the springs and but little further movement is necessa for the pin 40 to engage the said spring on s and thus the slight lost motion is cgrlite immaterial in the positioning of the sas From the foregoing it is evident that the structure is simple and eflicient in operation, that extreme rapidity'is secured in t e movementof the sash which is counterbalanced, and is automatically locked in position on release of the operatinghandle; v Having thusfully described our invention, what we claim isy 1. In sash operating mechanism, the combination with a frame and a sash vertically slidable therein, of sash operatin mechanism comprising a lazytongs consistingof two pairs of arms, the first pair being together pivoted near the bottom of the recess, the opposite endspivotally connected with the ends of the other arms, said other arms being pivoted intermediate their ends and having members at their ends for slidable connection with the bottom of the sash, a cross bar between the vertical members of the frame, a gear train thereon, a handle for operationof one of the gears, a rack engaginganother of the gears, a case in which the rack is slidable vertically, a pair of links pivoted to the lower end of the rack at one end and the opposite ends thereof beinglrespectively connected intermediate theends of the first pair of arms of the lazy tongs, a

blockto which the second pair of arms are slidable therein. of operating mechanism" comprising a lazy tongs consistingof two pairs of arms. the first pair being together pivoted near the bottom of the recess and the opposite ends being connected with the ends of a second pair of arms, said second pair being pivoted together intermediate their ends and having members in slidable conection with the sash, a gear'train', a rack vertically reciprocable thereby, and links each pivotally connected to the rack at one end and the other ends thereof being pivotally connected intermediatethe ends of the first pair of arms. i

3. In sash operating mechanism in combination with a frame and sash vertically slidable therein, of anism comprising a lazy tongs fixed in position at one end and connected with a sash at the other, a vertically movable rack, acase sash operating mechbalancing springs extending between bars of the lazy tongs tending to extend the same 10 t0 counterbalance the weight of the sash.

In testimony whereof, we sign this specification.

EDWARD L. 'ACKERMAN. ALOIS J. ZWIERZINA. 

